docs: def display_bounding_boxes_within_notebook(
      page_num, extractor, blocks, alternatecolors=False, color=Color("blue")
  ):
      """
      Displays each of the bounding boxes passed in 'boxes' on an image of the pdf
      pointed to by pdf_file
      boxes is a list of 5-tuples (page, top, left, bottom, right)
      """
      elems = extractor.elems[page_num]
      page_width, page_height = int(elems.layout.width), int(elems.layout.height)
      img = pdf_to_img(extractor.pdf_file, page_num, page_width, page_height)
      draw = Drawing()
      draw.fill_color = Color("rgba(0, 0, 0, 0)")
      draw.stroke_color = color
      for block in blocks:
          top, left, bottom, right = block[-4:]
          if alternatecolors:
              draw.stroke_color = Color(
                  "rgba({},{},{}, 1)".format(
                      str(np.random.randint(255)),
                      str(np.random.randint(255)),
                      str(np.random.randint(255)),
                  )
              )
          draw.rectangle(
              left=float(left), top=float(top), right=float(right), bottom=float(bottom)
          )
          draw(img)
      return img